Gate-valve.



F. MILLIKEN.

GATE VALVE. APPLICATION FILED AUG.18.I916.

Patented J an. 9, 1917.

IN VE/V TOR A TTORNEYS FOSTER MILLIKEN, 0F LAWRENCE, NEW YORK.

GATE-VALVE.

Specification ofLetters Patent.

Patented Jan. 9, 1917.

Application filed August 18, 1916. Serial No. 115,636.

To all whom it may concern:

Be it known that I, Fos'rnn MILLIKEN, a citizen of the United States, and a resident of Lawrence, in the county of Nassau and State of New York, have invented a new and Improved Gate-Valve, of which the following is a full, clear, and exact description.

This invention relates to gate valves provided with a pair of seats and a pair of disks, and has for an object to form these members so as to make a tight valve by bringing the faces of the disks and disk seats into perfect position and alinement, the arrangement being such as to also close the valve by against the disk seats with a uniform and great pressure.

Another object of the invention is the construction or design of the disks and the position and design of the wedges, whereby strain is transmitted from the wedges to the disks at the proper points near the edges of the disks.

A still further object of the invention is to construct the disks with comparatively great depth at the rims so as to be capable of transmitting the strains to the seats where the strain is utilized to make the valve tight.

A further object of the invention is to form the disks during the casting thereof whereby the distribution of the metal in the disks is so disposed that there isno danger of the face surface of the seat rings on the disks getting out of line through warping of the disks due to temperature changes when the valve is in use.

In the accompanying drawing :-Figure 1 is a longitudinal vertical section through a valve disclosing an embodiment of the invention. Fig. 2 is a section through Fig. 1 on line 2-2. Fig. 3 is a perspective view of the disks and associated parts shown as if they were opened as a hinge. Fig. 4 is a face view of one of the disks disclosing an arrangement of wedge sockets and reinforcing sections. Fig. 5 is atransverse section through the disks, the same being taken on line 5-5 of Fig. 4.

Referring to the accompanying drawing by numerals, 1 indicates a casing of an suitable kind provided with seats 2 and 8 for receiving the disks 4 and 5, said disks being provided with a coacting seat machined off or otherwise finished, said seat on the disks 4 and 5 being either integral with said disks or may be separate and secured thereto.

bringing the faces of the disks the disks so as to hold them normally in substantially proper position and for guiding them in their up and down movement. Each of the disks'is provided with a recess 10 for receiving the end 11 of the stem 12, which stem is threaded at'the upper end for receiving the operating wheel 13 whereby the stem may be raised and lowered whenever desired so as to open or close the valve. Each of the disks is provided with wedge sockets 14 and 15, each of said sockets having an inclined or beveled face for receiving the wedges l6 and 17, said wedges having stems 18 and 19 extending through the notches or grooves 20 and 21. The grooves 20 and 21 in each disk are semicylindrical so that when the disks are together a circular opening is produced, though other shapes could be used without departing from the spirit of the invention, the aim being to pro vide an opening for the depending extensions arranged on the wedges l6 and 17.

lVhen the parts are assembled and it is desired to close the valve the stem 12 is moved downwardly and carries with it the disks, said disks being guided in the grooves 8 and 9. The downward movement is con tinued until the projections 18 and 19 strike the bottom of the casing, whereupon the wedges will cease their movement and the disks will continue. This will cause the wedges to act on the beveled or inclined faces of the sockets 14 and 15 so that the disks will be moved from the position shown in Fig. 5 to an open or spread position as shown in Figs. 1 and 2. It will be observed that the wedges act substantially on the center of each side of the respective disks so that the disks are spread evenly and caused to engage their seat throughout for producing a tight connection. It will be observed that the lower face of the end 11 is somewhat wedge-shaped whereby the same will assist in a certain extent in spreading the disks after theextensions 18 and 19 have engaged the bottom of the casing.

As shown more particularly in Fig. 4, the disks are provided with what may be termed a reinforcing rim 22 which merges into the ears 6 and 7 and into the thickened sections 23 and 24, which in turn merge into the walls 25 and 26, a suitable groove 27 being '15 and also groove 27 an angle to the face 01. the disk,

weight. By arranging the sockets 14 and as described, the remaining metal of the disks is so distributed that there is no danger of the face surface of the seat rings on the disks getting out of line through warping of the disks when in use due to temperature changes, This idea of forming the disks is especially noticeable in the depth of the various disks which results in the use ofample metal, but by reason of the grooves, sockets, etc, the weight of the disks is reduced to a minimum though having ample material to withstand the great pressure used in maintaining the disk seats against the seats on thecasing when the valve is used in a high pressure line.

Vihat' I claim isi 1. A gate valve comprising a casing provided with a pair of seats, a pair of disks arranged between said seats, each-of said disks being formed with a central groove extending longitudinally therethrough and a pair of sockets on each side of said groove, each of said sockets having a bottom arranged at a pair of wedges fitting into said sockets, each of said wedges being formed with an extension projecting beyond the disk, and an operating member for moving said disks back and forth, said operating member acting to move said disks until the projections from the wedges engage the casing and separate the disks until they tightly engage said seats.

2. In a gate valve of the character described, a pair of disks, each of said disks being formed with a guiding car on each side, means engaging said ears for guiding said disks, a socket merging into a notch,

said socket'being provided to receive an op- Gopies of this patent may be obtained for arranged between said walls, said groove bemg merely for the purpose of reducing the erating stem, and a pair of cam sockets arranged an equal distance on opposite sides of a central line drawn one way across the disk, each of said cam sockets having an inclined bottom the center of which is approximately on a central line drawn at right angles to the first mentioned central line and a wedge for each of said sockets for forcing he disks bodily in a transverse direction for seating the same when the disks have been forced over the wedges.

3. In a valve of the character described, a disk formed from a single casting and provided with a pair of guiding ears, a groove extending centrally across one face of the disk and merging into a stem receiving socket, and a socket having a wedge receiving face arranged substantially centrally of the snace on each side of sair groove whereby a reinforcin ring is presented at the periphery of the disk.

4r. In a gate valve of the character described, a casing, a pair of disks, each disk being comparatively thick and formed with a groove extending across the disk centrally, and a cam socket arranged substantially centrally of the space on each side of the groove whereby there is produced a reinforcing ring substantially around the outer edge of the disk for preventing warping of the disk due to temperature changes when in use, and

the disks when in use, said wedges being formed with pro ections engaging said casing when the disks are being moved ther over.

FOSTER MILLIKEN.

lVitnesses FRANK H. SMITH, JOHN COLEMAN.

five cents each, by addressing the Commissioner of Patents; Washington, D. G.

a wedge for each of said disks for separating 

